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Asked: 2026-05-27T04:57:14+00:00

I am trying to do a file uploading on an ajax result page. the

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I am trying to do a file uploading on an ajax result page.

the main.php file is a basic ajax code as below:

<html>
 <head>
<script type="text/javascript">
    function loadXMLDoc() {
        var xmlhttp;
        if (window.XMLHttpRequest) { // code for IE7+, Firefox, Chrome, Opera, Safari
            xmlhttp = new XMLHttpRequest();
        } else { // code for IE6, IE5
            xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
        }
        xmlhttp.onreadystatechange = function () {
            if (xmlhttp.readyState == 4 && xmlhttp.status == 200) {
                document.getElementById("myDiv").innerHTML = xmlhttp.responseText;
            }
        }
        xmlhttp.open("GET", "file.php", true);
        xmlhttp.send();
    }
</script>    
 </head>
 <body>

<div id="myDiv"><h2>Let AJAX change this text</h2></div>
<button type="button" onClick="loadXMLDoc()">Change Content</button>

</body>
</html>

and the file uploading form file.php is as follow:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Untitled Document</title>
</head>

<body>
<form id="form1" name="form1" enctype="multipart/form-data" method="post" action="fileupload.php">
  <p>
    <label for="file"></label>
    <input type="file" name="file" id="file" />
  </p>
  <p>
    <input type="submit" name="submit" id="submit" value="Submit" />
  </p>
</form>
</body>
</html>

I have a 3rd file which process the file uploading fileupload.php

<?php
$file_fullname= $_FILES['file']['name'];
$file_ext1 = pathinfo($file_fullname, PATHINFO_EXTENSION);
$file_ext = ".".$file_ext1;
$file_name = pathinfo($file_fullname,PATHINFO_BASENAME);
$temp_name = str_replace($file_ext,'',$file_fullname);
$new_file_name = md5($temp_name . $dt);
echo $path= "upload/".$new_file_name . $file_ext;
$photo = $new_file_name . "" . $file_ext;
echo "<BR>";

   if ($_FILES["file"]["error"] > 0)
    {
    echo "Return Code: " . $_FILES["file"]["error"] . "<br />";
    }
  else
    {
    echo "Upload: " . $_FILES["file"]["name"] . "<br />";
    echo "Type: " . $_FILES["file"]["type"] . "<br />";
    echo "Size: " . ($_FILES["file"]["size"] / 1024) . " Kb<br />";
    echo "Temp file: " . $_FILES["file"]["tmp_name"] . "<br />";

    if (file_exists($path))
      {
      echo $path . " already exists. ";
      }
    else
      {
      move_uploaded_file($_FILES["file"]["tmp_name"], $path);
      echo "Stored in: " . $path;
      }
    }
?>

The page is working fine when I point the form post to fileupload.php

But when I moved the contents of fileupload.php into the file.php with the ajax code. it seems like the file uploading process is not run. Updated code file2.php is as follow:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Untitled Document</title>
    <script type="text/javascript">
    function fileup()
    {
    var xmlhttp;
    if (window.XMLHttpRequest)
      {// code for IE7+, Firefox, Chrome, Opera, Safari
      xmlhttp=new XMLHttpRequest();
      }
    else
      {// code for IE6, IE5
      xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
      }
    xmlhttp.onreadystatechange=function()
      {
      if (xmlhttp.readyState==4 && xmlhttp.status==200)
        {
        document.getElementById("myDiv").innerHTML=xmlhttp.responseText;
        }
      }
    xmlhttp.open("GET","file.php",true);
    xmlhttp.send();
    }
    </script>

<?php
$file_fullname= $_FILES['file']['name'];
$file_ext1 = pathinfo($file_fullname, PATHINFO_EXTENSION);
$file_ext = ".".$file_ext1;
$file_name = pathinfo($file_fullname,PATHINFO_BASENAME);
$temp_name = str_replace($file_ext,'',$file_fullname);
$new_file_name = md5($temp_name . $dt);
echo $path= "upload/".$new_file_name . $file_ext;
$photo = $new_file_name . "" . $file_ext;
echo "<BR>";

   if ($_FILES["file"]["error"] > 0)
    {
    echo "Return Code: " . $_FILES["file"]["error"] . "<br />";
    }
  else
    {
    echo "Upload: " . $_FILES["file"]["name"] . "<br />";
    echo "Type: " . $_FILES["file"]["type"] . "<br />";
    echo "Size: " . ($_FILES["file"]["size"] / 1024) . " Kb<br />";
    echo "Temp file: " . $_FILES["file"]["tmp_name"] . "<br />";

    if (file_exists($path))
      {
      echo $path . " already exists. ";
      }
    else
      {
      move_uploaded_file($_FILES["file"]["tmp_name"], $path);
      echo "Stored in: " . $path;
      }
    }
?>
</head>

<body>
<form id="form1" name="form1" enctype="multipart/form-data" method="post" action="fileupload.php">
  <p>
    <label for="file"></label>
    <input type="file" name="file" id="file" />
  </p>
  <p>
    <button type="button" onClick="fileup()">Upload</button>
  </p>
</form>
</body>
</html>

Can advice?? I am just trying to have the file uploading done in the ajax result section so there is no need to refresh the entire page.

Thanks!

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1 Answer

  1. Editorial Team

    Historically, the values of <input type="file"> elements have been inaccessible to JavaScript as a security precaution.

    The File API has been defined to offer some support for interacting with files in JavaScript, and it has some support — http://caniuse.com/fileapi.

    However, if compatibility with older browsers is a concern, you won’t be able to use Ajax to upload files.

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